In most countries where EV adoption is progressing you can count on a turnover of electric power generation from fossil to non-fossil sources. As that happens, EVs become greener and greener. Gas cars are still going to be gas cars.

You, ah, might want to check your numbers.

Fully 70 countries in the world generate more than 50% of their energy from renewables [1], and it's climbing rapidly.

[1] https://en.wikipedia.org/wiki/List_of_countries_by_renewable...

Electricity produced at scale using fossil fuels is more cleaner than ICE cars. https://www.bloomberg.com/news/articles/2019-01-15/electric-...

If you burn gasoline in an ICE car only about 30% of the energy of that gasoline ends up actually going to propelling your vehicle. The rest is mostly lost as waste heat.

Burn it in a combined cycle power plant to convert it to electricity and there are still substantial loses to waste heat but much less than when burning it an ICE car. There will be some smaller losses in the power grid and charging infrastructure to get that electricity into your battery, and some small losses in your EV's electric powertrain, but in the end around 40% of the energy of the fuel ends up going toward propelling your vehicle.